Khloe Kardashian seems to have a case of potty mouth these days!After angrily tweeting “Don’t you ever f*ck with my family” yesterday over an unknown issue, the reality starlet let the expletives fly again backstage during The X Factor.Entertainment Weekly went behind the scenes of the reality competition this week and observed a funny exchange between Khloe and One Direction members Niall Horan and Harry Styles. The two heartthrobs unceremoniously crashed an interview the reality star was giving to reporters backstage and poked fun at Khloe’s presenting skills.But when Niall and Harry asked what she thought of One Direction’s performance earlier in the show, she joked, “They were kind of sI*tty, but what are you going to do?”Yikes! We hope these guys aren’t the sensitive type.Source: Entertainment WeeklyCan’t get enough Kardashians gossip? Like us on our Facebook page or follow us on Twitter!